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","datePublished":"2026-07-03","dateModified":"2026-07-03","author":{"@type":"Person","@id":"https:\/\/blog.terabox.com\/author\/flextech-admin\/#Person","name":"flextech-admin","url":"https:\/\/blog.terabox.com\/author\/flextech-admin\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/ad516503a11cd5ca435acc9bb6523536?s=150&#038;d=mm&#038;r=gforcedefault=1","url":"https:\/\/secure.gravatar.com\/avatar\/ad516503a11cd5ca435acc9bb6523536?s=150&#038;d=mm&#038;r=gforcedefault=1","height":96,"width":96}},"publisher":{"@type":"Organization","name":"terabox","logo":{"@type":"ImageObject","@id":"http:\/\/blog.terabox.com\/wp-content\/uploads\/2021\/11\/logo\u4ea7\u54c1\u540d-\u7ad6\u7248.png","url":"http:\/\/blog.terabox.com\/wp-content\/uploads\/2021\/11\/logo\u4ea7\u54c1\u540d-\u7ad6\u7248.png","width":900,"height":900}},"image":{"@type":"ImageObject","@id":"https:\/\/img.youtube.com\/vi\/cLkSuTJ-_S4\/maxresdefault.jpg","url":"https:\/\/img.youtube.com\/vi\/cLkSuTJ-_S4\/maxresdefault.jpg","height":"","width":""},"url":"https:\/\/blog.terabox.com\/insights\/claude-4-7-anthropic-mythos-ai-safety-news","video":{"@context":"http:\/\/schema.org\/","@type":"VideoObject","@id":"https:\/\/www.youtube.com\/watch?v=cLkSuTJ-_S4#VideoObject","contentUrl":"https:\/\/www.youtube.com\/watch?v=cLkSuTJ-_S4","name":"Last Week in AI #241 - Opus 4.7, Muse Spark, GPT-5.4-Cyber, HY-World 2.0","description":"Our 241st episode with a summary and discussion of last week's big AI news!\n\nRecorded on 04\/18\/2026\n\nHosted by Andrey Kurenkov and Jeremie Harris\n\nFeel free to email us your questions and feedback at andreyvkurenkov@gmail.com and\/or hello@gladstone.ai\n\nRead out our text newsletter and comment on the podcast at https:\/\/lastweekin.ai\/\n\nIn this episode:\n\n    Anthropic released Claude Opus 4.7 with improved benchmark performance, new reasoning controls, better vision and memory, and a detailed system card discussing deception risk, evaluation-awareness steering, and a training bug that accidentally supervised chain-of-thought in 7\u20138% of episodes.\n    Meta unveiled its closed Muse Spark model and \u201ccontemplating mode,\u201d highlighting test-time scaling, thought compression, large infrastructure plans like the Hyperion data center, and findings that it shows unusually high evaluation awareness.\n    OpenAI introduced limited-access GPT 5.4 Cyber for defensive security teams and rolled major Codex updates including computer use, browser and plugins, image generation, and long-horizon task scheduling; competing agent products also launched from Anthropic, Canva, and Adobe.\n    Business, policy, and safety news included continued government blacklisting litigation affecting Anthropic, CoreWeave compute deals, Perplexity revenue growth tied to agents, a potential Cohere\u2013Aleph Alpha merger, attacks targeting Sam Altman and OpenAI, AI propaganda trends, and new alignment research on automated weak-to-strong supervision and steering evaluation awareness.\n\n\nTimestamps:\n\n    (00:00:10) Intro \/ Banter\n    (00:03:43) News Preview\n    (00:04:14) Response to listener comments\n\n\n    Tools & Apps\n    (00:05:30) Anthropic releases Claude Opus 4.7, narrowly retaking lead for most powerful generally available LLM | VentureBeat\n    (00:24:15) Meta debuts the Muse Spark model in a 'ground-up overhaul' of its AI | TechCrunch\n    (00:34:23) OpenAI Launches GPT-5.4-Cyber with Expanded Access for Security Teams\n    (00:39:44) OpenAI\u2019s big Codex update is a direct shot at Claude Code | The Verge\n    (00:42:10) Anthropic launches Claude Design, a new product for creating quick visuals\n    (00:42:30) Anthropic\u2019s New Product Aims to Handle the Hard Part of Building AI Agents | WIRED\n    (00:42:54) Canva\u2019s AI 2.0 update goes all in on prompt-powered design tools | The Verge\n    (00:43:06) Adobe\u2019s new AI Assistant marks a \u2018fundamental shift\u2019 in creative work | The Verge\n    (00:43:38) Gemini can now pull from Google Photos to generate personalized images | The Verge\n    (00:43:52) Google rolls out a native Gemini app for Mac | TechCrunch\n    (00:44:04) Chrome now lets you turn AI prompts into repeatable \u2018Skills\u2019 | The Verge\n\n\n    Applications & Business\n    (00:44:22) Anthropic loses appeals court bid to temporarily block Pentagon blacklisting\n    (00:49:07) Jeff Bezos\u2019 AI lab poaches xAI cofounder Kyle Kozic from OpenAI. | The Verge\n    (00:51:39) Perplexity's Shift to AI Agents Boosts Revenue 50%\n    (00:53:53) Anthropic Agrees to Rent CoreWeave AI Capacity to Power Claude\n    (00:57:32) Canada\u2019s Cohere, Germany\u2019s Aleph Alpha reportedly in merger talks\n    (01:04:23) ChatGPT has a new $100 per month Pro subscription | The Verge\n    (01:05:10) OpenAI has bought AI personal finance startup Hiro | TechCrunch\n    (01:07:03) Allbirds announced a switch from shoes to AI and its stock jumped 600 percent | The Verge\n\n\n    Projects & Open Source\n    (01:07:26) HY-World 2.0: A Multi-Modal World Model for Reconstructing, Generating, and Simulating 3D Worlds + Lyra 2.0: Explorable Generative 3D Worlds\n\n\n    Policy & Safety\n    (01:19:12) Daniel Moreno-Gama is facing federal charges for attacking Sam Altman\u2019s home and OpenAI\u2019s HQ | The Verge\n    (01:20:15) Duo accused of shooting at Sam Altman\u2019s house are freed; no charges filed \n    (01:24:50) The Iranian Lego AI video creators credit their virality to \u2018heart\u2019 | The Verge\n    (01:27:19) Hundreds of Fake Pro-Trump Avatars Emerge on Social Media - The New York Times\n    (01:27:31) The AI images Trump can\u2019t get enough of | Donald Trump | The Guardian\n    (01:29:25) Automated Weak-to-Strong Researcher\n    (01:43:51) Reproducing steering against evaluation awareness in a large open-weight model\n    (01:49:53) Iran threatens \u2018complete and utter annihilation\u2019 of OpenAI's $30B Stargate AI data center in Abu Dhabi \u2014 regime posts video with satellite imagery of ChatGPT-maker's premier 1GW data center\n    (01:53:57) Wall Street Banks Try Out Anthropic\u2019s Mythos as US Urges","thumbnailUrl":["https:\/\/i.ytimg.com\/vi\/cLkSuTJ-_S4\/default.jpg","https:\/\/i.ytimg.com\/vi\/cLkSuTJ-_S4\/mqdefault.jpg","https:\/\/i.ytimg.com\/vi\/cLkSuTJ-_S4\/hqdefault.jpg","https:\/\/i.ytimg.com\/vi\/cLkSuTJ-_S4\/sddefault.jpg","https:\/\/i.ytimg.com\/vi\/cLkSuTJ-_S4\/maxresdefault.jpg"],"uploadDate":"2026-04-23T07:35:34+00:00","duration":"PT1H59M49S","embedUrl":"https:\/\/www.youtube.com\/embed\/cLkSuTJ-_S4","publisher":{"@type":"Organization","@id":"https:\/\/www.youtube.com\/channel\/UCKARTq-t5SPMzwtft8FWwnA#Organization","url":"https:\/\/www.youtube.com\/channel\/UCKARTq-t5SPMzwtft8FWwnA","name":"Last Week in AI","description":"Weekly summaries of AI news! \nPlus occasional articles, interviews, and more. 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